Table 3.
Individually dosed and in-feed antimicrobial drug use (AMU) in number of animal daily doses (nADD) and total grams of antimicrobial drug (gAMD) by placement cohorta, cattle placed 2008–2012.
| Placement cohort | ||||||
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | Total | ||
| (n = 717,176) | (n = 670,066) | (n = 648,916) | (n = 578,924) | (n = 2,615,082) | ||
| nADD or gAMD, NO. (NO./100,000 CATTLE) | ||||||
| Individual | nADD | 1,680,387 (234,306) | 1,532,732 (228,743) | 1,383,193 (213,154) | 1,226,748 (211,901) | 5,823,060 (222,672) |
| gAMD | 3,674,494 (512,356) | 3,462,134 (516,685) | 2,899,241 (446,782) | 2,611,049 (451,018) | 12,646,918 (483,615) | |
| In Feed | nADD | 8,300,631 (1,157,405) | 7,539,570 (1,125,198) | 7,105,901 (1,095,042) | 5,744,496 (992,271) | 28,690,598 (1,097,120) |
| gAMD | 46,488,463 (6,482,155) | 42,304,541 (6,313,489) | 39,735,901 (6,123,428) | 32,315,393 (5,581,975) | 160,844,298 (6,150,641) | |
The total nADD or gAMD is presented on the left side of the cell, and the nADD/100,000 cattle or gAMD/100,000 cattle is presented on the right side of the cell in parentheses.
a
Placement cohort comprised of cattle placed in the feedlot between 1 November and 31 October of consecutive years.